Stop ring

ABSTRACT

A circular stop ring has hook parts of a L-shape of a circular shape or other shapes which catch nipples of snap pinchers and which is protruded and formed on the base surface of a stop ring body having a gap formed between the hook parts by cutting and separating a part of the circular stop ring.

Umted States Patent 1151 3,701,303

Kondo 1451 Oct. 31, 1972 [541 STOP RING 2,595,787 5/1952 Heimann..85/8.8 72 Inventor: Isamu Kondo 2 99 Aza Mi i 3,204,991 I Hauk *j zxf'jlg FOREIGN PATENTS 0R APPLICATIONS 618,117 2/1949 Great Britain..287/DIG. 7 [22] d' 1971 889,388 9/1953 Germany ..85/8.8 [21] Appl.No.: 127,118 137,832 10/1952 Sweden ..85/8.8

52 .Cl ..85 8.8 81 302 Primary Farms 1511 c1 Flb 2 1/18 Atwmey-wendewth-Lind Pmack [58] Field of Search.....8S/8.8, 8.6; 287/135; 285/39,

285/321 [57] ABSTRACT A circular stop ring has hook parts of a L-shapeof a [56] References Cited circular shape or other shapes which catchnipples of P snap pinchers and 1S protruded and formed on the basesurface of a stop ring body having a gap 1,328,399 1/1920 Ready ..85/8.8formed between h hook parts by cutting and gigs? separating a part ofthe circular stop ring. 2:456:572 12/1948 Wagstaff ..85/8.8 6 Claims, 11Drawing Figures PATENTEDnm a: ma

SHEU 1 0F 4 Fig 5 PATENIED um 3 I I972 SHEET [1F 4 -FigbA STOP RING Thepresent invention relates to a stop ring for use on both a shaft and ahole and more particularly relates to such' a stop ring which has hookparts protruded and formed on a base surface of the stop ring body insuch a manner that they face each other and have a gap formed anddisposed therebetween by cutting and separating a part of the stop ring.

Generally speaking, in the case of installing a gear on a shaft, a stopring is employed for overcoming movement in the axial direction of thegear in order to prevent it from axial directional movement. But thestop ring formerly used was, as shown in FIG. 8, such a ring in whichsmall holes 19 were formed on protruded ends 18 disposed on the bothends of the stop ring with a gap formed therebetween by cutting andseparating. Then, by inserting a nipple 21 of snap pinchers 20 intothese small holes 19 and by opening the said gap with manipulation ofsnap pinchers 20, the installing and the removing of the stop ring 17into and from a circular groove A provided on the circumference of ashaft 15 attached with a gear 16, have been performed.

In this instance an operation for fitting the stop ring 17 into thegroove 15A of the shaft 15 is comparatively simple. But, under thecondition wherein the stop ring 17 is installed on the shaft 15, thegear 16 is in contact with the side surface of the ring 17, andtherefore, nipples 21 of the snap pinchers 20 are prevented by the sidesurface of the gear 16 from being deeply inserted into the small hole19. Consequently, although no problem would be confronted with theopening of a gap of the stop ring, it is necessary to depend on africtional force only between the nipple 21 and the small hole 19 whenpulling it in the axial direction. Therefore, the removal operation wasperformed under extremely troublesome circumstances in the past.Accordingly, in the worst case, there often existed such an instance inwhich machinery had to be dismembered and a shaft had to be removed froma pillow block in order to remove a single stop ring.

The first object of the present invention is to provide a device whereinthe stop ring has protruding hook parts, into which nipples of snappinchers are inserted to hold it in the circular direction and the axialdirection of a shaft.

The second object of the present invention is to provide a devicewherein the stop ring is formed by cutting and raising a part of thebase surface of the stop ring body in a L-shape to form the hook partsand, further, by facing the open end sides of the cut-raised parts toeach other with the gap provided therebetween.

The third object of the present invention is to provide a device whereinthe stop ring is obtained by cutting and raising a part of the basesurface of the stop ring body in a L-shape to form the hook parts and,further, by forming and facing the open end sides of the said cut-raisedparts in the opposite direction away from the gap.

The fourth object of the present invention is to provide a devicewherein the cut-raised parts, as shown in the foregoing second and thirdobjects, are provided face to face with each other on each base surface,each part of each cut-raised part being L-shaped, whereby the holdingsurfaces necessary for expanding and contracting the gap and removingthe device in the axial direction by inserting snap pinchers into theinterior surface of the both cut-raised parts are formed.

The fifth object of the present invention is to provide a device whereinall of the hook parts formed by the cut-raised parts for the snappinchers can be formed by press working.

The sixth object of the present invention is to provide a device whereinthe hook parts required for inserting the nipples of the snap pincherscould be formed and attached not only by press working but also bystudding pins with heads or welding orsoldering a small piece of aL-shape of a U-shape or a half-cut cylindrical shape on the basesurfaces of the stop ring body.

The seventh object of the present invention is to provide a devicewherein the base surfaces can be protruded and formed either inwardly oroutwardly from the circumference of the stop ring body and, having thehook parts formed on such base surfaces, the stop ring being either foruse in a shaft or in a hole.

All of these objects are accomplished by configurations, structures andcombinations of the respective parts comprising the present invention,the preferred embodiments of which are shown by way of example in theaccompanying drawings and hereafter described in detail.

FIG. 1 is a perspective view of a stop ring for use on a shaft, and is afirst practical embodiment of the present invention;

FIG. 2 shows a perspective view of a stop ring in accordance with asecond practical embodiment of the present invention;

FIG. 3 shows a perspective view of a third practical embodiment of thestop ring of the present invention;

FIG. 4 shows a perspective view of a fourth practical embodiment of thestop ring of the present invention;

FIG. 5 is an enlarged perspective view of the operation of the firstembodiment shown in FIG. 1;

FIGS. 6A and 68 respectively show a front view and a side view of thecondition under which by using snap pinchers the attaching and removingof the stop ring of FIG. 1 is performed;

FIGS. 7A and 7B respectively show a front view and a side view of thecondition under which the inserting and removing of a stop ring such asshown in FIG. 2 may be performed; and

FIGS. 8A and 88 respectively show a front view and a side view of theconventional method for manipulating the attaching and removing a stopring.

In FIG. 1, a gap 2A is formed by the forming of a notch on a part of thecircumference of the stop ring body 1A for use on a shaft. The flat basesurface 3A on each side of gap 2A protrudes outwardly from thecircumference and has therein acut-raised part 5A formed by the cut-in4A from the side of gap 2A by press working on base surface 3A. Thecut-raised part 5A is formed in a L-shape by bending it in parallel withthe base surface 3A, and a hook part 6A is formed between the cut-raisedpart 5A and the base surface 3A.

FIG. 2 shows a stop ring for use in a hole in which the arrangements inthe foregoing practical embodiment are reversed and the cut-raised parts58 formed by the cut-ins 4B are cut and raised so that the open endsides face away from the gap 2B. As shown in the drawing, the cut-raisedparts 5B are formed in a L-shape, and the hook parts 68 are formed.

As for FIG. 3, a pair of cut-raised parts SC in a L- shape section areformed to face each other by press working on each base surface 3C ofthe stop ring body 1C opposite the gap 2C. Thus, hook parts 6C of ac]shape section with a partly cut-off space between the ends of the twocut-raised parts C are formed.

Each hook part of the stop ring bodies shown in the drawings from FIG. 1to P16. 3 illustrate examples wherein all of the forming work isperformed by press working.

However, FIG. 4 shows one example in which press working is not employedand shows a practical embodiment of a stop ring for use in a holewherein a pin 9 with a flat head 8 projects from each base surface 3D ofthe stop ring body 1D with a gap 2D. The hook parts 6D are formed on theboth sides of the flat heads 8.

For a different configuration from this practical embodirnent, theremight be provided a small piece of semicircular arc shape formed bycutting a ring into half, or a small piece of a L-shape or a1] -shapesection could be attached.

FIGS. 2, 3 and 4 described above show examples wherein a stop ring foruse in a hole is particularly employed, but it is needless to say thatby protruding and forming the cut-raised portion outwardly from thecircumference of the stop ring body and, further, by providing a hookpart thereon, it could be applied to the stop ring for use in a shaft.

Now, the condition under which a shaft stop ring is inserted andattached on the shaft shall be described in FIGS. 5 and 6 using the stopring as shown in FIG. 1 as exemplary.

First, in case a shaft stop ring 1A inserted and fitted, as shown inFIG. 68, into a circular groove 11 on the circumference of a shaft so asto hold a gear 22, which is keyed on the circumference of the shaft 10,is to be removed, nipples 13 of a flat shape and with the base partsbroadened which are disposed at the tip ends of snap pinchers, areinserted into the hook parts 6A from the outside of the circumference ofthe stop ring body 1A, that is, from the circumferential direction ofthe shaft. By tightly holding handles 14 of the snap pinchers and byopening the nipples 13 with a holding pin 15 of the handles 14 servingas the center, the cutraised parts 3A of the shaft stop ring is expandedvia the hook parts 6A. Then, the stop ring is withdrawn along the shaft10 from the circular groove.

in this instance each nipple 13 of the snap pinchers 12 is, as shown inFIG. 5, supported by three holding surfaces, that is, the base surfaceof cutraised part 3A of the stop ring body 1A and the surfaces made bythe L-shape of the cut-raised part 5A. Therefore, the stop ring will beheld in a stabilized condition not only during expansion in thecircumferential direction but also during movement in the axialdirection, and thus, the stop ring can be removed easily.

In case the stop ring shown in FIG. 2 is installed in a groove in a holeand is to be removed from the groove, snap pinchers 12 as shown in FIG.7 provided at its tip ends with nipples 13 of a flat shape, with thebase part of the tip ends broadened, and with the tip ends bent, areused. The nipples 13 are inserted and fitted into the hook parts 6B ofthe stop ring 1B which is positioned in the circular groove 11A of theshaft hole 10A and which thus holds a bush 16A. The nipples 13 are heldby surfaces made by the hook part 6B of a L-shape and the base surface313. By grasping the handles 14, the

gap 28 is narrowed by the nipples 13 so that the outer circumferentialedge of the stop ring body 18 is removed from the circular groove 11Aand, thus, may be removed in the axial direction.

The manipulation described above is entirely the same for thepracticalembodiments shown in FIGS. 3 and 4, and the point common to anyof the embodiments is that, having arranged the hook part formed with ashape necessary for inserting the nipples of the snap pinchers inparallel with the base surface protruding inwardly or outwardly from thecircumference of the stop ring, the nipples 13 may be inserted therein,and the supporting surfaces necessary for expanding and contracting thegap of the stop ring body are provided. By these arrangements theinstallation and removal of the stop ring may be performed very easilywith the employment of the snap pinchers provided with rigid and flatnipples, because the stop ring for use in a shaft or a hole maybe keptunder a stabilized condition by pressure produced by these threesurfaces during expansion, contraction and movement in the axialdirection.

Consequently, in general, it is usual that a stop ring is installedadjacent to a machinery element such as a gear, etc. However, even insuch a case the movement of the stop ring shall not be affected by suchelements, and its effectiveness is apparent since its use eliminates alltroublesome work such as dismembering machinery in order to remove astop ring as performed formerly.

What is claimed is:

l. A stop ring comprising a circular stop ring body having a radial gapformed therein; a base surface extending radially from each end of saidbody adjacent said gap; at least one cut-raised part extendingperpendicularly from each of said base surfaces; and a holding surfaceextending from each of said cut-raised parts and being parallel witheach of said base surfaces; whereby a hook part is formed between eachof said holding surfaces and said base surfaces for receiving the nippleof a tool for insertion and removal of said stop ring.

2. A stop ring as claimed in claim 1, wherein said base surfaces extendradially outwardly from said each end of said body; and wherein saidholding surfaces extend from said cut-raised parts toward said gap, eachpair of said cut-raised parts and said holding surfaces form an L-shape.

3. A stop ring as claimed in claim 1, wherein said base surfaces extendradially inwardly from said each end of said body.

4. A stop ring as claimed in claim 3, wherein said holding surfacesextend from said cut-raised parts away from said gap, each pair of saidcut-raised parts and said holding surfaces form an L-shape.

S. A stop ring as claimed in claim 3, wherein each of said base surfaceshave thereon a pair of perpendicularly extending cut-raised parts; andsaid holding sur faces of said cut-raised parts of each of said basesurfaces extend toward each other; said pair of cut-raised parts andrespective holding surfaces of each of said base surfaces form an :1-shape.

6. A stop ring comprising a circular stop ring body having a radial gapformed therein; a base surface extending radially inwardly from each endof said body adjacent said gap; at least one raised part extendingperpendicularly from each of said base surfaces; and a holding surfaceextending from each of said raised parts and being parallel with each ofsaid base surfaces; whereby a hook part is formed between each of saidholding surfaces and said base surfaces for receiving

1. A stop ring comprising a circular stop ring body having a radial gapformed therein; a base surface extending radially from each end of saidbody adjacent said gap; at least one cut-raised part extendingperpendicularly from each of said base surfaces; and a holding surfaceextending from each of said cut-raised parts and being parallel witheach of said base surfaces; whereby a hook part is formed between eachof said holding surfaces and said base surfaces for receiving the nippleof a tool for insertion and removal of said stop ring.
 2. A stop ring asclaimed in claim 1, wherein said base surfaces extend radially outwardlyfrom said each end of said body; and wherein said holding surfacesextend from said cut-raised parts toward said gap, each pair of saidcut-raised parts and said holding surfaces form an L-shape.
 3. A stopring as claimed in claim 1, wherein said base surfaces extend radiallyinwardly from said each end of said body.
 4. A stop ring as claimed inclaim 3, wherein said holding surfaces extend from said cut-raised partsaway from said gap, each pair of said cut-raised parts and said holdingsurfaces form an L-shape.
 5. A stop ring as claimed in claim 3, whereineach of said base surfaces have thereon a pair of perpendicularlyextending cut-raised parts; and said holding surfaces of said cut-raisedparts of each of said base surfaces extend toward each other; said pairof cut-raised parts and respective holding surfaces of each of said basesurfaces form an -shape.
 6. A stop ring comprising a circular stop ringbody having a radial gap formed therein; a base surface extendingradially inwardly from each end of said body adjacent said gap; at leastone raised part extending perpendicularly from each of said basesurfaces; and a holding surface extending from each of said raised partsand being parallel with each of said base surfaces; whereby a hook partis formed between each of said holding surfaces and said base surfacesfor receiving the nipple of a tool for insertion and removal of saidstop ring; said raised parts comprising pins extending from said basesurfaces, and said holding surfaces comprising heads of said pins.